- Practice
- Tutorials
- Cracking the Coding Interview
- Arrays: Left Rotation

# Arrays: Left Rotation

# Arrays: Left Rotation

A *left rotation* operation on an array shifts each of the array's elements unit to the left. For example, if left rotations are performed on array , then the array would become . Note that the lowest index item moves to the highest index in a rotation. This is called a *circular array*.

Given an array of integers and a number, , perform left rotations on the array. Return the updated array to be printed as a single line of space-separated integers.

**Function Description**

Complete the function *rotLeft* in the editor below.

rotLeft has the following parameter(s):

*int a[n]:*the array to rotate*int d:*the number of rotations

**Returns**

*int a'[n]:*the rotated array

**Input Format**

The first line contains two space-separated integers and , the size of and the number of left rotations.

The second line contains space-separated integers, each an .

**Constraints**

**Sample Input**

```
5 4
1 2 3 4 5
```

**Sample Output**

```
5 1 2 3 4
```

**Explanation**

When we perform left rotations, the array undergoes the following sequence of changes: